The probability that a person catches a cold during the cold and flu season is 0.4. assume that 10 people are chosen at random.
what is the probability that exactly four of them will catch a cold
1 answer:
From the information given;
P(cold) = 0.4
P(no cold) = 1-0.4 = 0.6
The number of ways of selecting 4 from 10 = 10C4 = 210
Probability that the 4 selected with catch a cold:
P(4 will catch cold) = (10C4)*P(cold)^4*P(no cold)^6 = 210*0.4^4*0.6^6 = 0.2508
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